Automatic gas cut-off or alarm.



A. l. KRYNITZKY. AUTOMATIC GAS CUT-OFF 0R ALARM.

APPLICATION FILED APR. 24. 1918- A w W MA m .s i 2 n u W K h J AW 5 4 m8 M M M 1 u wnc A. l. KRYNITZKY.

V AUTOMATIC GAS CUT-0H 0R ALARM.

' APPLICATION FILED APR. 24, 1918. 1,294,484. Patented Feb.18,1919.

2 SHETSSHEET 2.

anon H 0;

(Human,

heat or the laei;

Another ob ct of the mvent1on is to provide a device of this characterwhich 1s s1m-.

ALEXANDER I. KBINITZKY, OF IPHILADEIlPHIA, PENNSYLVANIA.

AUTOMATIC GAS GUT-OFF OR ALARM.

To all whom it may concern."

Be it known that I, ALEXANDER I. KRY

NrrzKY, a citizen of Russia, residing at Philadelphia, in the county ofPhiladelphia and State of Pennsylvama, have invented new and usefulImprovements in Automatic Gas-Cut-Ofis or Alarms, of. which thefollowingis a specification.

This invention relates to new and useful improvements in apparatus foraut0matically'stopping the flow of gas when the flame should becomeextinguished or for sound-.

ing an alarm or both. Another objectof the invention is to employ a bodywhich will'expand under the act1on of heat and to utilize the movementof this body for operating means for con-' trolling the gas or soundingthe alarm. This body may be' of any desired material, either'solid,liquid or gaseous which be expanded or congrzlilcted by the action of 0eat.

ple and durable in construction, reliable and efficient in operation andone which can be placed upon the market manufactured and at a minimumcost. i

The invention also consists in certain other features of constructionand in the combination and arrangem'entof the several parts, to behereinafter fully described, illus trated in the accompanying drawingsand s ecifically pointed out in the appended In describing my inventionin detail, reference willbe had to 'the accompanying drawings whereinlike characters denote like or corresponding partsthroughout the severalviews, and in which- V Figure 1 is a sectional view of'one form of theinvention.

Fig. 2 is. a side view. Fig. 3 is a detail 'ew of one of the electriccontacts.

Fig. 4 is a sectional view of a modification. a

Fig. 5 is a sectional view of another modification.

Specification of Letters Patent.-

Application filed April 24, 1918. Serial No. 280,580.

. drawin Figs. 6 and 7 are views of other modifications. F g. 8 is afront view of still another modificatlon.

F1g. 9 is a longitudinal section through Fig. 8.

ment of the contact 1n Figs. 1 and 2. Fig. 11 is another modification.

ger from that shown Referring more particularly to these and to the formof the invention shown in Figs. 1, 2 and 3,-the reference character 1indicates a semi-circular supporting member and shield having anupwardly extending tubular extension 2, which supports a sector shapeddial 3 at its upper end. A collar 4. on said extension 2 enga es thelower end of a brace 5 for said dial. The members 1 and 2 may be made ofasbestos or any other suitable material and said members are sup ortedin any desired manner adjacent to t e gas burner so that the heat fromthe flame will be directed on to the artia-lly spherical member 6suplported 1n the member 1. This member 6 as its upper end closed by amembrane 6 and is adapted to contain air or gas which" will beexpandedwhen subjected to heat. v

I prefer to make the member 6 of copper and the membrane of a thin sheetof copper,

thou h it will be understood that any other siuta le material-may beused to form said part. 7 is a rod passing upwardly through PatentedFeb.18, 1919. l

v v Fig. 10 shows a sliglgtly different arrangethe tubularmember 2 andhavingits lower end connected with the membrane 6. The

upper end of the rod is connected with the small end of a sectorshaped'lever 8, pivoted intermediate its ends. to the rear face of thedial,as'at 9. 'Iheenlar ed end of said lever has its.edge provide withteeth, which engage a toothed wheel 10 carried by a shaft 11 journaledin the dial. The said. shaft is connected with a contact finger 12,which is made of conducting material. The shaft 11 is also made ofconducting material andis suitably insulated from the dialand this shafthas connected thereto one of the terminal wires 13 of an electriccircuit. The

other terminal wire it of this circuit is connected with a springcontact 15 carried by the dial and suitably insulated therefrom. Thiscontact is normally held in inclined position asshown in-Fig. 3 so as toset up a wedge action with' the finger to insure a proper contactbetween the parts. 16 indicates a latch pivoted to the dial and adaptedto engage the end of the finger to hold in raised position and out ofennt with the spring contact. 17 indiplurality of rollers carried by the...r 2 and engaging with the rod 7. I may make the dial ofnon-conducting material so as to render unnecessary the insulation ofthe contact and shaft therefrom. ll may also cover the inside of themember 1 with thin metal which acts as a reflector.

The electric circuit may be connected with means for controlling theflow of gas the through the burner or with means for sounding an alarm,or'both, when the circuit is closed.

'While the gas is unlighted the finger is held in raised position bymeans of the latch 16. After the gas is lighted the heat from the flamewill cause the expansion of the air or gas within the member 6 so thatthe membrane 6 is raised, and thus-the rod 7 will be; moved upwardly tooscillate the lever 8.

This will cause the finger to remain in raised position. The latch 16 isthen swung outwardly away "from the finger. The device is now set so asto operate the before mentioned mechanism ii the flame should becomeextinguished. if this should happen the air or gas in the member 5 willcontract and thus permit the membrane to lower. This will cause the rodto drop and rock lever 8, and said lever through the wheel 10 and shaft11 will swing the finger 12 downwardly into-engagement with the contact15 so as to complete the electric circuit and thus sound the alarm orshut oil the gas.

In the modification shown in Fig. 4 the rod 7 is located in a tube 18,preferably made of iron and having a spherical lower end 19. Thisspherical lower end contains mercury and the end of the rod is providedwith a piston 20 which rests on said mercury. In this way the expansionand contraction of the mercury will cause the movement of said rod,which will operate the parts as before described.

In the modification shown in Fig. 5 I locate a cylinder 21 of graphitebetween the mercury and piston. In other respects this form is similarto that just described.

In the modification shown in Fig. 6, instead of making the lower end oftube'18 spherical I- make it semi-spherical as indicated at 22 in saidfigure. In other respects this form is similar 'to that shown in Fig.4e.

In the modification shown in Fig. 7 the rod 7 is made of ezrpansiblemetal and has its lower end seated in a tubular member 23.

This member is made of quartz, or similar material and supports the rodadjacent the flame of the burner. In other respects this modification issimilar to that shown in the other figures.

In the modification shown in Figs. 8 and 9, 24 indicates a frame havinga recess 25 in its front face in which is seated a spherical member 26.The upper end of this member has connected therewith'a hollow spiraltube 27, the other end of which is bent at right angles and passesthrough a curved slot 28 formed in the frame. A finger 29 pivoted at 30to the frame has its extreme end connected with said end of the tube.The rear face of the frame 24 is provided with a shelf 31 on which isseated a battery 32. The wires from this battery pass to the springcontact 33 carried at the top of the frame and with which the finger isadapted to engage. The other wire of the circuit is connected with thepivot 30. The alarm or shut off means for the gas is connected with saidcircuit and the spherical member and tube contain air or gas so that theexpansion and contraction of same will cause the end of the tube to movein the slot and thus oscillate the finger to make and brealr theelectric circuit, as before described.

In the modification shown in Fig. 10 the finger 29 is pivoted to thedial, as at 29 and its end is connected directly with the rod 7 so as torender the use of the lever 8, in Figs. 1 and 2, unnecessary.

In the modification shown in Fig. 11 the form of the frame 24 isslightly difierent from that before described, but in the other respectsthis form is similar to that shown in Figs. 8 and 9.

I prefer to omit the latch 16 and'to place an ordinary switch in thecircuit. In this case when the gas is not lighted the pointer or finger12 will rest against the contact 15.

When the gas is lighted the finger will rise ofi the contact 15 and thenthe switch may in the combination and arrangement of the several parts,vprovided that such changes fall within the scope of the appended claim.

What I claim is A device of the class described comprising a combinedsupporting member and shield adapted to be located adjacent a burner,said member having a semi-circular recess in its lower part and anupwardly extending part, an expansible body having a substantiallyspherical part located in said recess, a contact finger carried by theupper part of said member for actuating devices for soundin an alarm orfor shutting off the gas, an means for connecting the finger with theex- 10 pr osible body.

In testimony whereof I aflix my signature.

ALEXANDER I. KRYNITZK Y.

